31243322916 has 60 divisors (see below), whose sum is σ = 87959015452. Its totient is φ = 9613328832.

The previous prime is 31243322893. The next prime is 31243322939. The reversal of 31243322916 is 61922334213.

31243322916 is a `hidden beast` number, since 3 + 1 + 243 + 322 + 91 + 6 = 666.

It is an interprime number because it is at equal distance from previous prime (31243322893) and next prime (31243322939).

It can be written as a sum of positive squares in 2 ways, for example, as 8190974016 + 23052348900 = 90504^2 + 151830^2 .

It is a super-2 number, since 2×31243322916² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a nude number because it is divisible by every one of its digits.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 3704635 + ... + 3713058.

Almost surely, 2^31243322916 is an apocalyptic number.

31243322916 is a gapful number since it is divisible by the number (36) formed by its first and last digit.

It is an amenable number.

31243322916 is an abundant number, since it is smaller than the sum of its proper divisors (56715692536).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

31243322916 is a wasteful number, since it uses less digits than its factorization.

31243322916 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7417722 (or 7417711 counting only the distinct ones).

The product of its digits is 46656, while the sum is 36.

The spelling of 31243322916 in words is "thirty-one billion, two hundred forty-three million, three hundred twenty-two thousand, nine hundred sixteen".